Review of research on steel support with corrugated webs

The research progress on optimistic analysis and ultimate bearing capacity of the conventional metal supports, such as mine I-beam, U-shaped steel and concrete filled steel tubes, is summarized. It especially focused on introducing a new type of steel support with corrugated webs. The advantages of steel support with corrugated webs in bearing capacity and economy compared with traditional supports, the global stability bearing capacity and local stability of the steel support structure with corrugated webs in different roadway profiles are introduced herein. It also reviews the research work and achievements on the yieldable connecting configuration, as well as the interaction between the support and the surrounding rock. It can be concluded that the prominent advantages of the support with corrugated web are its high supporting capacity and light weight, which is economical and greatly reducing the labor intensity. The two types of yieldable connecting components (high-strength bolts and wedge sleeves) are developed, which can solve the eccentricity issue of traditional one, besides, the surrounding rock load on the supports can be reduced through connection yielding and pressure relief, which could improve the stability and service life of the steel supports with corrugated webs. The research achievements have vital reference significance to the future development of new support structures for coal mine roadways with rock bursts.